32316 Federal Register / Vol. 80, No. 109 / Monday, June 8, 2015 / Proposed Rules 

of U.S. registry. We also estimate that it 

would take about 0.5 hours per engine 

to comply with this proposed AD. The 

average labor rate is $85 per hour. We 

estimate that the pro-rated cost of the 

life reduction would be about $23,053 

per engine. Based on these figures, we 

estimate the cost of this proposed AD on 

U.S. operators to be $531,197. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. ‘‘Subtitle VII: 

Aviation Programs,’’ describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in ‘‘Subtitle VII, 

Part A, Subpart III, Section 44701: 

General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

the DOT Regulatory Policies and 

Procedures (44 FR 11034, February 26, 

1979), 

(3) Will not affect intrastate aviation 

in Alaska to the extent that it justifies 

making a regulatory distinction, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD): 

Rolls-Royce Deutschland Ltd & Co KG: 

Docket No. FAA–2015–1014; Directorate 

Identifier 2015–NE–14–AD. 

(a) Comments Due Date 

We must receive comments by August 7, 

2015. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Rolls-Royce 

Deutschland Ltd & Co KG (RRD) Tay 650–15 

and Tay 651–54 turbofan engines with highpressure turbine (HPT) stage 1 disk, part 

number (P/N) JR32013, installed. 

(d) Reason 

This AD was prompted by RRD updating 

the life limits for certain HPT disks. We are 

issuing this AD to prevent failure of the HPT 

disk, which could result in uncontained disk 

release, damage to the engine, and damage to 

the airplane. 

(e) Actions and Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(1) After the effective date of this AD, use 

the Accomplishment Instruction, paragraph 

3.A.(1)(b) of RRD Alert Non-Modification 

Service Bulletin (NMSB) No. TAY–72– 

A1821, Revision 1, dated March 26, 2015 to 

calculate the HPT stage 1 disk consumed 

cyclic life of the affected engines. 

(2) Remove the HPT stage 1 disk, P/N 

JR32013, from service within 100 flight 

cycles after the effective date of this AD or 

before exceeding the cyclic life limit as 

defined below, whichever occurs later: 

(i) For RRD Tay 650–15 engines and Flight 

Plan A, the life limit is 18,900 flight cycles 

since new (FCSN). 

(ii) For RRD Tay 650–15 engines and Flight 

Plan B, the life limit is 15,500 FCSN. 

(iii) For RRD Tay 650–15 engines and 

Flight Plan C, the life limit is 11,500 FCSN. 

(iv) For RRD Tay 650–15 engines and 

Flight Plan D, the life limit is 9,300 FCSN. 

(v) For RRD Tay 651–54 engines regardless 

of flight plan or profile, the life limit is 

10,873 FCSN. 

(f) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Engine Certification Office, 

FAA, may approve AMOCs for this AD. Use 

the procedures found in 14 CFR 39.19 to 

make your request. You may email your 

request to: ANE–AD–AMOC@faa.gov. 

(g) Related Information 

(1) For more information about this AD, 

contact Philip Haberlen, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7770; fax: 781–238–7199; 

email: philip.haberlen@faa.gov. 

(2) Refer to MCAI European Aviation 

Safety Agency AD 2015–0056, dated March 

31, 2015, for more information. You may 

examine the MCAI in the AD docket on the 

Internet at http://www.regulations.gov by 

searching for and locating it in Docket No. 

FAA–2015–1014. 

(3) RRD Alert NMSB No. TAY–72–A1821, 

Revision 1, dated March 26, 2015, can be 

obtained from RRD, using the contact 

information in paragraph (g)(4) of this 

proposed AD. 

(4) For service information identified in 

this proposed AD, contact Rolls-Royce 

Deutschland Ltd & Co KG, Eschenweg 11, 

Dahlewitz, 15827 Blankenfelde-Mahlow, 

Germany; phone: 49 0 33–7086–1064; fax: 49 

0 33–7086–3276. 

(5) You may view this service information 

at the FAA, Engine & Propeller Directorate, 

12 New England Executive Park, Burlington, 

MA. For information on the availability of 

this material at the FAA, call 781–238–7125. 

Issued in Burlington, Massachusetts, on 

May 12, 2015. 

Colleen M. D’Alessandro, 

Assistant Directorate Manager, Engine & 

Propeller Directorate, Aircraft Certification 

Service. 

[FR Doc. 2015–13743 Filed 6–5–15; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–0869; Directorate 

Identifier 2015–NE–11–AD] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for all Pratt 

& Whitney (PW) PW4164, PW4168, 

PW4168A, PW4164–1D, PW4168–1D, 

PW4168A–1D, and PW4170 turbofan 

engines. This proposed AD was 

mstockstill on DSK4VPTVN1PROD with PROPOSALS

Federal Register / Vol. 80, No. 109 / Monday, June 8, 2015 / Proposed Rules 32317 

prompted by crack finds in the 6th stage 

low-pressure turbine (LPT) disk. This 

proposed AD would require removal of 

affected 6th stage LPT disks. We are 

proposing this AD to prevent failure of 

the 6th stage LPT disk, which could 

lead to an uncontained disk release, 

damage to the engine, and damage to the 

airplane. 

DATES: We must receive comments on 

this proposed AD by August 7, 2015. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Pratt & 

Whitney, 400 Main St., East Hartford, 

CT 06108; phone: 860–565–8770; fax: 

860–565–4503. You may view this 

service information at the FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA. For 

information on the availability of this 

material at the FAA, call 781–238–7125. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2015– 

0869; or in person at the Docket 

Management Facility between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Office 

(phone: 800–647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

Katheryn Malatek, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7747; fax: 781–238– 

7199; email: katheryn.malatek@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this NPRM. Send your comments to an 

address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2015–0869; Directorate Identifier 2015– 

NE–11–AD’’ at the beginning of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this NPRM. We will consider 

all comments received by the closing 

date and may amend this NPRM 

because of those comments. 

We will post all comments we 

receive, without change, to http://

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this NPRM. 

Discussion 

We received reports of two crack finds 

in the front and rear knife-edge seals on 

the forward arm of the 6th stage LPT 

disk during a scheduled heavy 

maintenance shop visit. The suspected 

root cause of the cracks is residual stress 

introduced during knife-edge weld 

repair. This condition, if not corrected, 

could result in failure of the 6th stage 

LPT disk, which could lead to an 

uncontained disk release, damage to the 

engine, and damage to the airplane. 

Related Service Information Under 1 

CFR Part 51 

We reviewed PW Service Bulletin No. 

PW4G–100–72–252, dated November 

18, 2014. This service information 

identifies and directs removal of the 

suspect 6th stage LPT disks. This 

service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or see ADDRESSES for 

other ways to access this service 

information. 

FAA’s Determination 

We are proposing this NPRM because 

we evaluated all the relevant 

information and determined the unsafe 

condition described previously is likely 

to exist or develop in other products of 

the same type design. 

Proposed AD Requirements 

This NPRM would require removing 

certain serial number 6th stage LPT 

disks, part number 50N886. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 18 engines installed on 

airplanes of U.S. registry. We also 

estimate that no additional hours would 

be required per engine to comply with 

this proposed AD because the engine is 

already disassembled in the shop when 

we require the part to be removed. The 

average labor rate is $85 per hour. We 

estimate that 6 of the engines will 

require replacement parts during an LPT 

shop visit, and that the prorated 

replacement parts cost would be 

$108,800 per engine. Based on these 

figures, we estimate the cost of this 

proposed AD on U.S. operators to be 

$652,800. 

Authority for this Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in Subtitle VII, 

Part A, Subpart III, Section 44701: 

‘‘General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

the DOT Regulatory Policies and 

Procedures (44 FR 11034, February 26, 

1979), 

(3) Will not affect intrastate aviation 

in Alaska to the extent that it justifies 

making a regulatory distinction, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

mstockstill on DSK4VPTVN1PROD with PROPOSALS

32318 Federal Register / Vol. 80, No. 109 / Monday, June 8, 2015 / Proposed Rules 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD): 

Pratt & Whitney: Docket No. FAA–2015– 

0869; Directorate Identifier 2015–NE– 

11–AD. 

(a) Comments Due Date 

We must receive comments by August 7, 

2015. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Pratt & Whitney 

(PW) PW4164, PW4168, PW4168A, PW4164– 

1D, PW4168–1D, PW4168A–1D, and PW4170 

turbofan engines with 6th stage low-pressure 

turbine (LPT) disks, part number 50N886, 

installed. 

(d) Unsafe Condition 

This AD was prompted by crack finds in 

the 6th stage LPT disk. We are issuing this 

AD to prevent failure of the 6th stage LPT 

disk, which could lead to an uncontained 

disk release, damage to the engine, and 

damage to the airplane. 

(e) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. At the next LPT shop visit after the 

effective date of this AD, remove from service 

6th stage LPT disks with serial numbers 

listed in the Accomplishment Instructions, 

Table 1, of PW Service Bulletin (SB) No. 

PW4G–100–72–252, dated November 18, 

2014. 

(f) Definition 

For the purpose of this AD, an ‘‘LPT shop 

visit’’ is defined as maintenance which 

involves disassembly of the LPT rotor 

module. 

(i) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Engine Certification Office, 

FAA, may approve AMOCs for this AD. Use 

the procedures found in 14 CFR 39.19 to 

make your request. You may email your 

request to: ANE-AD-AMOC@faa.gov. 

(j) Related Information 

(1) For more information about this AD, 

contact Katheryn Malatek, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; phone: 781–238–7747; fax: 781–238– 

7199; email: katheryn.malatek@faa.gov. 

(2) PW SB No. PW4G–100–72–252, dated 

November 18, 2014, can be obtained from 

Pratt & Whitney using the contact 

information in paragraph (j)(3) of this 

proposed rule. 

(3) For service information identified in 

this proposed rule, contact Pratt & Whitney, 

400 Main St., East Hartford, CT 06108; 

phone: 860–565–8770; fax: 860–565–4503. 

(4) You may view this service information 

at the FAA, Engine & Propeller Directorate, 

12 New England Executive Park, Burlington, 

MA. For information on the availability of 

this material at the FAA, call 781–238–7125. 

Issued in Burlington, Massachusetts, on 

May 12, 2015. 

Colleen M. D’Alessandro, 

Assistant Directorate Manager, Engine & 

Propeller Directorate, Aircraft Certification 

Service. 

[FR Doc. 2015–13742 Filed 6–5–15; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF HOMELAND 

SECURITY 

Coast Guard 

33 CFR Part 165 

[Docket No. USCG–2015–0443] 

RIN 1625–AA00 

Safety Zone; Nighttime Air Show, 

Milwaukee Harbor; Milwaukee, 

Wisconsin 

AGENCY: Coast Guard, DHS. 

ACTION: Notice of proposed rulemaking. 

SUMMARY: The Coast Guard proposes to 

establish a safety zone within 

Milwaukee Harbor in Milwaukee, 

Wisconsin. This zone is intended to 

restrict vessels from a portion of 

Milwaukee Harbor due to an air show. 

This proposed safety zone is necessary 

to protect the surrounding public and 

vessels from the hazards associated with 

the air show. 

DATES: Comments and related material 

must be received by the Coast Guard on 

or before July 8, 2015. 

ADDRESSES: You may submit comments 

identified by docket number USCG– 

2015–0443 using any one of the 

following methods: 

(1) Federal eRulemaking Portal: 

http://www.regulations.gov. 

(2) Fax: 202–493–2251. 

(3) Mail: Docket Management Facility 

(M–30), U.S. Department of 

Transportation, West Building Ground 

Floor, Room W12–140, 1200 New Jersey 

Avenue SE., Washington, DC 20590– 

0001. 

(4) Delivery: Same as mail address 

above, between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. The telephone number is 202– 

366–9329. 

See the ‘‘Public Participation and 

Request for Comments’’ portion of the 

SUPPLEMENTARY INFORMATION section 

below for instructions on submitting 

comments. To avoid duplication, please 

use only one of these four methods. 

FOR FURTHER INFORMATION CONTACT: If 

you have questions on this proposed 

rule, call or email Petty Officer Joseph 

McCollum, U.S. Coast Guard Sector 

Lake Michigan; telephone 414–747– 

7148, email Joseph.P.McCollum@

uscg.mil. If you have questions on 

viewing or submitting material to the 

docket, call Cheryl Collins, Program 

Manager, Docket Operations, telephone 

202–366–9826. 

SUPPLEMENTARY INFORMATION: 

Table of Acronyms 

DHS Department of Homeland Security 

FR Federal Register 

NPRM Notice of Proposed Rulemaking 

A. Public Participation and Request for 

Comments 

We encourage you to participate in 

this rulemaking by submitting 

comments and related materials. All 

comments received will be posted 

without change to http://

www.regulations.gov and will include 

any personal information you have 

provided. 

1. Submitting Comments 

If you submit a comment, please 

include the docket number for this 

rulemaking (USCG–2015–0443), 

indicate the specific section of this 

document to which each comment 

applies, and provide a reason for each 

suggestion or recommendation. You 

may submit your comments and 

material online at http://

www.regulations.gov, or by fax, mail, or 

hand delivery, but please use only one 

of these means. If you submit a 

comment online, it will be considered 

received by the Coast Guard when you 

successfully transmit the comment. If 

you fax, hand deliver, or mail your 

comment, it will be considered as 

having been received by the Coast 

Guard when it is received at the Docket 

Management Facility. We recommend 

that you include your name and a 

mailing address, an email address, or a 

telephone number in the body of your 

document so that we can contact you if 

we have questions regarding your 

submission. 

To submit your comment online, go to 

http://www.regulations.gov, click on the 

‘‘submit a comment’’ box, which will 

then become highlighted in blue. In the 

mstockstill on DSK4VPTVN1PROD with PROPOSALS